Auto-tracking method and apparatus of a magnetic recording/reproducing apparatus
US4613914A · kind A · utility
12Cited by
0References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 15, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Jul 15, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/4676
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An auto-tracking method and apparatus of a helical scan type magnetic recording/reproducing apparatus wherein envelope levels of reproduced signals are detected and the running phase of a magnetic tape is controlled so that the envelope level of the reproduced signal becomes maximum after detection is effected roughly and then finely, thereby allowing a video head to scan a track on the magnetic tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.